Quantitative Measure of Phase Noise Assessment for Quartz Oscillators

This paper considers the method of estimating the frequency instability of a quartz oscillator via measuring the Allan variance. The method is a two-sample variance and allows estimating the phase noise of an oscillator in the entire frequency-detuning region via a single numerical value, which is sometimes very important for the development of equipment. Taking into account possible sources of phase noise, in our paper the phase noise was considered by the imaginary frequency-detuning zones and sources of its origin. Temperature-stabilized quartz oscillators with artificially introduced sources of phase noise were practically studied.